Jam-free slider with control throat



y 27, 1958 L. H. MORIN 2,835,953

JAM-FREE SLIDER WITH 'CQRTROL THROAT Filed June 2, I955 INVENTOR.

Lows H. Mom

QZ/IJA 4/1/1111; 7

55 35 34 a 54 35 ATT'ORNEY.

2,835,953 Patented May 27, 1958 f .ICC

JAM-FREE SLIDER WITH CONTROL THROAT Louis H. Morin, Bronx, N. Y.

Application June 2, 1955, Serial No. 512,610

13 Claims. (Cl. 24-20515) This invention relates to what are generally referred to as jam-free sliders for separable fastener stringers. More particularly, the invention deals with what 1 term a slider of this type having :a control element at the throat, which constantly maintains engagement of the stringer scoops at the throat area of the slider while, at the same time, providing relief, in the event of jamming, through a movable or yieldable back plate, which is recessed to receive and envelope the control element.

Still more particularly, the invention deals with a slider of the character described, wherein the control element is formed as an integral part of the top wall of the slider through an extending bar member joining the top wall through the integral web.

The novel features of the invention will be best understood from the following description, when taken together with the accompanying drawing, in which certain embodiments of the invention are disclosed and, in which, the separate parts are designated by suitable reference characters in each of the views and, in which:

Fig. 1 is :a longitudinal section through a complete slider, with parts of the construction shown in elevation and with part broken away.

Fig. 2 is a bottom plan view of the top wall part only of the slider body on an enlarged scale from the showing in Fig. 1.

Fig. 3 is a top perspective view of the back plate or bottom wall part of the slider, detached.

Fig. 4 is a perspective bottom view of the top wall part of the slider, detached; and

Fig. 5 is a partial section on the broken line 5-5 of Fig. 1.

My improved slider consists of two primary flanged wall parts, namely a top wall part it and a back or bottom wall part 11, these parts being shown in assembled relationship in Fig.1 of the drawing, in which figure, the

pivot post 12 of the wall part 19 is shown for receiving the pivot pin 13 for pivoting a lock element 14 on said wall part, the lock element having a tooth end portion 15, which extends into the channel 16 of the slider assemblage through an aperture 17 formed in the wall 18. The forward end portion of the-wall 18 includes an upwardly extending stirrup or yoke 19, in connection with which a projecting lug 20, on the tooth end 15, operates in checking outward movement of the lock element 14. I

The downwardly extending web portion 21 of the top wall includes, in its upper surface, a socket 22 for receiving a coil spring 23, the latter seating in a recess 24 in the element 14 and serving to normally support the lock element in the operative position, shown in Fig. 1.

The pull 25 is indicated, in part, in Fig. 1 of the drawing and the pivot end 26 of the pull operates in a recessed portion 27 of the lock element in actuating said element against the action of the spring 23 to move the tooth end out of the channel 16 of the slider body.

Considering Fig. 2 of the drawing, it will appear that the wall 18 of the top wall'part 10 has, at the throat end portion 28, substantially parallel flanges 29, which flare outwardly and terminate at the widest diameter of the wall, as at 36.

Integral with the web 21 is a forwardly directed bar or bar member 31, which includes a pair of downwardly directed longitudinally spaced rivet members 32. Integral with the forward end portion of the bar 31 is a throat control element 33 including, at its sides, upwardly extending parallel flanges 34 which, in conjunction with the parallel portions of flanges 29, define the throat or what might be termed the mouth of the slider, which maintains the scoops in coupled relationship at this particular control point. That is to say, control of the scoops is maintained not only with respect to their height but also their width. The element 33 is in the form of a transverse narrow wall. The depth of the element 33 is substantially consistent with the length of the parallel portion of the flanges 29, so as to free the scoops at the beginning of the flared portion of the flanges, as will clearly appear from a consideration of Fig. 2 of the drawing.

It will be noted, from a consideration of Fig. 2 of the drawing, that the flanges 34 are substantially one-half the thickness of the flanges 29, so as to leave, outwardly of the flanges 34, room for reception of the parallel portions of flanges 35 of the bottom wall part 11, the flanges 35 fitting over and projecting beyond the flanges 34. In other words, aside from the formation of the deep recess 36 in the throat end portion of the bottom wall 11, the general contour of the flanges of the bottom wall would be the same as the flanges 29 of Fig. 2 of the drawing, the recess 36 being adapted to receive the element 33. The bottom wall 11 includes an elongated aperture 37 for reception of the bar 31, the bottom wall 11 being recessed, at its rear end, as seen at 33, substantially in lalinement with the side walls of the web 21, so as to clear any flare or roughened edge that may prevail on said side edges, thus dispensing with finishing operationsin assemblage of the slider wall parts.

From a consideration of Fig. 1 of the drawing, it will appear that, in assemblage of the wall parts, a substantially yoke-shaped spring 39 is arranged upon the bar 31 within an enlarged portion 37' of the aperture 37 and a retaining plate 40, substantially conforming to the contour of the aperture 37', but greater in length and Width than the bar 31 is secured in position by the rivets 32 and forms a backing for the spring 39 to normally support the bottom wall 11 in operative position. In the jam-free action of the slider, the bottom wall 11 is free to move downwardly against the action of the spring 39. In this latter action, it will be apparent that the control element 33 maintains the control throat or mouth of the slider, so as to maintain coupled relationship of the scoops at this particular localized area of the slider body. More specifically, when the slider encounters an obstruction which tends to move wall 11 and therefore flanges 35 away from wall 11 the flanges 34 on element 33 will still serve to control the scoops.

The element 33 is in the form of a crosshead at the end of the bar 31 and forms what might be termed a stabilizing member for stabilizing the wall part 11 in its movement relatively to the wall part 19, as well as to check movement of the wall part 11 toward the wall part 10 in maintaining normal spacing, which defines the channel 16.

This application is a continuation-in-part of copending applications Ser. No. 403,199, filed I an. 11, 1954, now Patent No. 2,811,764 issued Nov. 5, 1957, and Ser. No. 494,781, filed March 16, 1955.

Having fully described my invention, what I claim as new and desire to secure by Letters Patent is:

. 1. In jam-free sliders employing relatively movable taining a fixed nonyielding double flanged throat at said contractcdend either-slider independently of yield ability of the wall parts of the slider body, said'double flanged throat comprising on one side of the throat a pair of flanges on said'control element cooperable with, and disposed oppositely to, a pairofflanges on the wall port on the other side of the throat. 7 Q2. In jam-free sliders employing relatively movable top and bottomwall parts having flanged end portions at the contracted end of the slider, spring means adapted to resiliently bias one wall part toward the other wall part, means integral with. one wall part at the contracted end of the slider-forming control element maintaining a fixed non-yielding double flanged throat at said contracted end of the slider independently of yieldability of the wallparts of the slider body, and said control element comprising a transverse member having parallel side flanges directed toward and in alinement with corresponding parallel portions of flange-s of the first. named wall part. 7

3. In. jam-free sliders employing relatively movable top, and bottom wall parts having flanged end portions at the contracted end of the slider, spring means adapted to resiliently bias one wall part toward the other wall part, means integral with one wall part at the contracted end ofthe slider forming a control element maintainingwa fixed non-yielding double flanged throat at said contracted end of the slider independently of yieldability of the wallparts of the slider body, said control element comprising a transverse member having parallel portions of side flanges directed toward and in alinement with corresponding parallel flanges of the first named wall part, and the other'wall part'being recessed to receive said elementca nd having parallel portions of flanges overlying the parallel flanges of said control element.

4. A am-free slider of the character described, comprising a top wall parLand'a bottom wall part, means yieldably supporting the; bottom wall part on said top wall partfor movement of said parts toward and from each other, said wall parts having parallel portions of side flanges at the contracted end portion of the slider body, the top wall part including 'an integral control ele ment having parallel side flanges in alinement with inner adjacent surfaces of and spaced from the side flanges of said top wall part at sai contracted end of the slider body, and said bottom wall part being recessed to receive said element with the flanges of the bottom wall part overlying the flanges of said-control element.

'5. In sliders for separable fastener stringers employing relatively movable topand bottom wall parts for jamfree action of the slider on a pair of fastener stringers,

spring means adapted to resiliently bias one wall part toward the other'wall part, said top wall part having, at a contracted end portion thereof, means providing a fixed control channel defined by opposed flanged walls restricted to said contracted end portion, and the flanges of said opposed walls being parallel and in alinement.

6. A slider ofcthe character described, comprising top and bottom wall parts having flanged ends, means yieldof said slider, and said stabilizing member including flanged sides fitting in the recessof the bottom wall part.

i 7, Av slider of the character described, comprising .top

'4 V V V I and bottom wall parts having flanged ends, spring means yield'ably supporting the wall parts in predetermined spaced relationship to eaclf other while permitting rela-" tive movement of the wall parts one With'respect to the other in jam-freeing operation of the slider, said bottom wall part having a recess in the flanged end portion thereof, the top wall part, including a stabilizing member arranged and operating in said recess in maintaining alinement of the wall parts one with respect to the other in operation of said slider, said recess extending into the flanges at said end portion of the bottom wall part, and

said stabilizing member including flanges occupying the recessed portion of the flanges of said bottom wall part.

8. A slider of thecharacter described comprising top and bottom wall parts having flanged narrow ends and integral therewith, means integral with the web for movably supporting said bottom wall part, saidmeans including astabilizing member operatively engaging the bottom wall part at the narrow end thereof to maintain alinernent of said wall parts one with respect to the other in the use of the slider, said member having flanges extending toward the flanges on the top wall part, said bottom wall part being recessed to receive said flanged member, aplate attached to said means and serving to hold the bottom wall part thereon, and yieldable means disposed between the plate and'the bottom wallpart to normally support the bottom wall part in operative position. 7 r g 9. A slider for separable fastener stringers comprising a flanged top member, a bottom member and a Web joining said members, a movable flanged wallpart associated with thebottom-member, said wall part having a-lc-n gitudinal recess for receiving the bottom member and also having a pair of grooves each alined with a side edge of the web, a transverse extension on the bottom member on the end remote from said web, said extension having flanges extending towarclthe flanges on the top member, a transverse recess in the wall part for receiving said extension, the flanges of the wall part overlying and extending beyond the flanges of the extension, said flanges of the wall par-L and extension being thinner than those of the top member, a retaining member for said wall part secured to the outer side of the bottom member and disposed in said longitudinal recess, yieldable means engaging the wall part and retaining member ata plu-' rality of spaced points and acting to bias the wall part towards said top member, said wallpart being rockable about the central longitudinal axis thereof and being further characterized by the fact that a force exerted on a peripheral portion thereof in a direction away from the top member will-move said wall part.

10 A slider according to claim 9 in which said yieldable means comprises a pair of bowed spring members. i

ll. A slider accordingto claim 10 in which said spring members extend longitudinally of-the slider.

12.. A slider according to claim 11 in which said wall part has a pair of opposed shoulders extending partially across said longitudinal recess, and said spring members being disposed on said shoulders.

13. A slider for slide fastener stringers comprising a" pair of spaced members connected by a web at one end thereof, a flanged part disposed on one of said members and spaced from the other member, said other member being flanged, the space between said'flanged part andsaid other member providing a guiding slot for a stringer, said'one member having a flanged transverse extension at the end of the slider remote from the web end, said flanged part having a transverse recess for receiving said extension whereby said flanged part overlies the flanged extension, thereby providing a more stable disposition of the flanged part on said one member, the flanges on said part extending beyond those on said extension, means for ;movablyi mounting and resiliently maintaining said flanged part .withrespectto said one member such that the part is movable in a direction to increase the Width of said slot and is normally maintained in a position in which the slot Width is less than the maximum possible width, said flanged part being automatically movable to increase the Width of said slot upon contact with an obstruction coming between the slider and a stringer, the flanges on said extension in conjunction with the flanges on said other member serving to control the stringers during said automatic movement of the flanged part, and said flanged part and flanged other member 10 helping to prevent the slider from being laterally removed from the stringers.

References Cited in the file of this patent UNITED STATES PATENTS 2,240,048 Morin Apr. 29, 1941 2,433,801 Weber Dec. 30, 1947 2,721,367 Deshaw Oct. 25, 1955 UNITED STATES PATENT 01mm CERTEFEATE OF CORRECTIUN Patent No 2,835,953 May 27, 1958 Louis Ha Morin It is hereby certified that error appears in "the printed specification of the above numbered patent requiring correction and that the said Letters Patent should read as corrected below.

Column 3, lines 35 and 36, strike out "portions of" and insert the same after "parallel", in line 37, same column.

Signed and sealed this 5th day of August 19580 (SEAL) Attest:

km T Ho, AXLINE RUBERT C. WATSON Attesting Officer Commissioner of Patents 

